Stop mechanism for roving frames



April 1934- G. w. GRIER ET AL 1,955,365

STOP MECHANISM FOR ROVING FRAMES Filed July 13. 1932 EGkGk gjvwwwoos GLENN WGR/El? 11 Jam/w E NOR/(ET.

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Patented Apr. 17, 1934 1,955,365

UNETED STATES FATE a! FICE STOP MECHANISM FOR ROVING FRAMES Glenn W. Grier and J cram E. Norket, Selma, N. 0.

Application July 13, 1932, Serial No. 622,294

Claims. (01. 1l.83)

Our invention relates to mechanism associated to one end of a short shaft 13, supported by cast with roving frames, otherwise known as fly bearings 14 at each end and carrying on the opframes. posite end a beveled gear 15, which meshes with It consists in the novel stop mechanism and gear 16 of angle, pitch and teeth to be determined 55 operating means therefor herein disclosed and by the ratios of the roving number to be made. 6-3 claimed. This gear 16 is the change gear of the device and The invention is designed to insure the accurate is mounted on a shaft 17 provided with a worm measurement of the length of the strand of rovgear 18, which meshes into a gear 19 of correing required to be placed upon the receiving bobsponding angle, pitch and teeth, attached to a bin of any roving frame commonly used in the short shaft sustained at right angles with the manufacture of roving from any textile fibre for former shaft by proper cast iron bearings and the spinning process. carrying a spirally grooved hub 20 in which the One of the objects of this invention is to obend of a lever arm 21 is set. This lever arm is tain accuracy in this measurement by actuating jointed at point 22 and a spring 23 presses the the mechanism by and from the front roll (delivfree end of the arm toward the face of the gear to cry roll) of the roving frame, thereby eliminat- 19. The other arm 24 of the lever is attached by ing the inaccuracy caused by lost motion of geara chain 25 to a weight 26. This arm engages a ing, by belt loosening and slippage, by variation in pin or stop 27 on the knock-out bar 28 when the tension devices, and by the many other uncertain lever is released by the grooved hub. 2G acting parts of the frame when measurement is The operation of my device is as follows:

attempted from other than the direct action of When the required number of yards of roving the delivery roll. has been wound on the bobbins, lever arm 21 has Another object of this invention is to provide reached the end of grooved hub 20 and falls out, an instant, positive and self-braking stop motion thereby releasing the weight 26 which causes for slubber, intermediate speeder or jack roving the lever arm 24 to strike the pin 27 in the knockframes of whatever manufacture, using a roll off bar 28 and thus stops the machine. delivery to bobbin or spool or other similar con- Since the action of the three pairs of roving tainer, carrier or package. rollers upon the strands from the preceding proc- Still another object of this invention is to proess is the last step of the roving process, the rov- 3o vide ameans of measurement of the length of the ing passes directly from the front rolls to the a strand of roving uniformly for all frames and to bobbin or other receiver. stop all frames at the same given length of strand, Thus the space between the bite of the front so that the product of any frame controlled by rolls to the point of the flyer presser which winds this device may be used on subsequent machines the roving on the bobbin is the only place where in the further processes indiscriminately, at ranour device has no tell-tale effect in carrying out dom and without any selection whatever, thus the entire process. Here if the roving is avoiding sequent creeling to prevent waste of stretched, we lose actual yardage count, but not stock, time, etc. weight. The result would be some more roving In the accompanying drawing, of a lighter per yard weight, which would upset Fig. l is a plan, and our system in the succeeding process. However, Fig. 2 is a side elevation of my invention. there is but one thing that could cause stretch- Like characters designate the same parts ing of the roving between these two points, i. e., throughout the specification and drawing. a change in the tension. Tension is controlled Characters l0, l0 and 10" denote, respecby one gear for all spindles on one frame; thus tively, the front, middle and back rolls of the rova change of tension would not disturb the relap ing frame to be controlled. A worm gear 11 of tion of the bobbins on that frame, but all the the exact diameter of the front roll is formed bobbins on that frame would carry more or less thereon either by cutting into the front roll or by roving than that on the next frame, if its tension milling down the front roll shaft section or" the gear were not also changed. Therefore one rule .30 top roll. It may also be inserted into the roll or is absolute in the use of our device for measuring Q5 shaft by joint or other contact, or otherwise atpurposes: Keep all roving frames at the same tached thereto. This worm gear is meshed at tension, and do not change one without changing right angles into a gear 12 of a number of teeth all. Otherwise it will be necessary to creel to be determined by the ratio of speed and the the succeeding process with all rovingfrom the size of the front roll. The latter gear is attached one frame changed, instead of using any bobbins from any frame to make up the creel of the next, without any selection.

Our device is actuated from the delivery roll at the point of delivery after every adverse influence has been expended. It stops the machine by the count of the revolutions of this delivery roll, and measures the length of the roving by multiplying the circumference of the roll by its revolutions. The diameters of these rolls on various makes of frames vary from one to one and one-eighth inches; thus this device will measure within three or four inches of the predetermined length.

In devices wherein the stop mechanism is controlled from some other part of the machine, such devices will be caused to err in exactness and accuracy as a measurer of the ultimate length of the roving on a bobbin by each of the gears, bearings, shaftings, belts, etc., between their point of actuation and the front rolls, and with the conditions as to wear, balance, friction, etc., of each of these parts individually and collectively. Such a device has no control of any factor entering into the length of a layer; it simply counts them of whatever length they may come.

With our stopping device it is possible by simple mathematical calculation to so figure the gears and ratios as to predetermine exactly the yardage or to arrange these gears and ratios to get any desired yardage. The value of this is that we can build a bobbin on the slubbers that will make exactly a given (or predetermined) number of bobbins on the intermediates, each bobbin of which will make, in turn, exactly a given (or predetermined) number of bobbins on the Speeders. Thus by knowing the yardage we are able to make all creels run out at the same time, enabling full frame creeling, and by predetermining the sizes of each bobbin we are enabled to creel on the doff, as well. Full frame creeling on the doff is desirable, since it permits better oiling, cleaning and repairing of machinery at a time when no stock-in-process is within that machine, and thus the danger of spoilage from lint, dirt or oil is entirely eliminated.

Where the trip which releases the stop motion is operated by a cam or eccentric, an uncertainty is created as to when the action will occur, since a lessening of the friction (as by excessive oiling) hastens the movement and knock-off, and, conversely, increasing the friction (as by an accumulation of linty or gummy oil on the point) delays the action and knock-off. Rust alters the contact surface of the cam point, and vibration of the machine and the mill floor tends to jar it out of position.

Our means for releasing the stop motion is a one-way worm, which drops a bar trigger. It cannot be hastened or delayed, its action being positive and instantaneous. A fall motion is always more sure, sudden and sharp than any lift or push motion can be, Wear at the point of the worm groove or of the point of the bar cannot alter or affect the action or change the timing of the action, since the reset spring puts the bar back into the worm just where it was before and a complete revolution must be made before it drops again.

Other devices are mere layer-counters. In devising them no attempt has been made to produce yardage counters, and such devices furnish insufficiently accurate results on which to judge as to the cause of failure on any particular spindle of the sequent process.

But with the present device assurance of the accuracy of the measurement of the content of the bobbin necessitates looking to some other part of the machine for the point of failure, if and when such occurs. Thereby is located either the roller, the spindle or the gear (in the machine) which is out of tune with the others, and the cause of its failure is ascertainable on the spot. In other machines one would know that somewhere on some frame there is trouble and failure either in the making or the finishing, but in ours the exact spindle or roller in the finishing process is exposed, because nothing could have happened in the making process to have caused the failure.

What we claim is:

1. In a machine of the character described, a roving frame with roving rollers, a stop mechanism therefor, and measuring means operated from the roving rollers for automatically actuat ing the stop mechanism when a predetermined length of roving has been delivered from the machine, said measuring means including a hub gear rotated from the delivery roll of the machine, provided with a complete spiral groove engraved around the surface of the hub, a lever having a portion tending to engage said stop mechanism and a laterally movable arm engaging in said groove and adapted to drop off the hub at the end of the groove to release the stop engaging portion.

2. In a machine of the character described, a roving frame with roving rollers, a stop mech anism therefor, and measuring means operated from the roving rollers for automatically actuating the stop mechanism when a predetermined length of roving has been delivered from the machine, said measuring means including a spirally grooved hub rotated from the roving rollers, a lever having a portion tending to engage said stop mechanism, a laterally movable arm engaging in said groove to drop off at the end of the groove, and resilient means for resetting the movable arm when it has displaced from the groove.

3. In a machine of the character described, a roving frame with roving rollers, a stop mechanism therefor, and measuring means operated from the roving rollers for automatically actuating the stop mechanism when a predetermined length of roving has been delivered from the machine, said measuring means including a spirally grooved hub rotated from the roving rollers, a lever having a portion tending to engage the stop mechanism of the machine, said lever including a laterally movable arm engaging in said groove to drop off the hub at the end of the groove, resilient means for resetting the movable arm when it has displaced from the groove, and a weight attached to said lever for holding the movable arm in place in said groove.

4. In a machine of the character described, a roving frame having roving rollers, a stop mechanism therefor, measuring means operated from the roving rollers, and including a rotating cylinder having a spiral groove on the surface thereof extending to a free end of the cylinder, and actuating means for said stop mechanism operated by said measuring means, including a bell crank, one arm of which is laterally movable and engaged by said spiral thread, tending to force the arm to the end of the cylinder to drop it off, the other arm of the bell crank being weighted and tending to engage said stop mechanism, but restrained by the engagement of the force the arm to the end of the cylinder to drop it off, the other arm of the bell crank being weighted and tending to engage said stop mechanism, but restrained by the engagement of the other arm with said thread until the end of the thread is reached, and resilient means tending to hold the laterally movable arm in frictional engagement with the spiral thread during rotation of the cylinder.

GLENN W. GRIER.

JORAM E. NORKET. 

